1 finding aid(s) found containing the word(s) Hayes, C. L. (Clarke L.)--Correspondence.

  1. Herman Hollerith papers, 1850-1982

    11,700 items ; 34 containers plus 1 oversize ; 13.6 linear feet. -- Manuscript Division, Library of Congress, Washington, D.C.

    Summary:

    Inventor and businessman. Correspondence, diary, financial and business papers, patents by Hollerith and others, blueprints, drawings, a Hollerith machine punch plate, writings about Hollerith by Geoffrey Austrian and others, biographical material, and other papers relating to Hollerith tabulating machines and their use in census taking (1890-1910), operation of Tabulating Machine Company and...